37221912 has 288 divisors, whose sum is σ = 137030400. Its totient is φ = 8895744.

The previous prime is 37221901. The next prime is 37221923. The reversal of 37221912 is 21912273.

It is an interprime number because it is at equal distance from previous prime (37221901) and next prime (37221923).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1618333 + ... + 1618355.

It is an arithmetic number, because the mean of its divisors is an integer number (475800).

Almost surely, 2^37221912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 37221912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68515200).

37221912 is an abundant number, since it is smaller than the sum of its proper divisors (99808488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

37221912 is a wasteful number, since it uses less digits than its factorization.

37221912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 67 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 37221912 is about 6100.9763153122. The cubic root of 37221912 is about 333.8870379465.

The spelling of 37221912 in words is "thirty-seven million, two hundred twenty-one thousand, nine hundred twelve".