44151661 has 2 divisors, whose sum is σ = 44151662. Its totient is φ = 44151660.

The previous prime is 44151631. The next prime is 44151683. The reversal of 44151661 is 16615144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42380100 + 1771561 = 6510^2 + 1331^2 .

It is a cyclic number.

It is not a de Polignac number, because 44151661 - 2¹¹ = 44149613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44151631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22075830 + 22075831.

It is an arithmetic number, because the mean of its divisors is an integer number (22075831).

Almost surely, 2^44151661 is an apocalyptic number.

It is an amenable number.

44151661 is a deficient number, since it is larger than the sum of its proper divisors (1).

44151661 is an equidigital number, since it uses as much as digits as its factorization.

44151661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 44151661 is about 6644.6716246930. The cubic root of 44151661 is about 353.4399866912.

The spelling of 44151661 in words is "forty-four million, one hundred fifty-one thousand, six hundred sixty-one".