31554401 has 2 divisors, whose sum is σ = 31554402. Its totient is φ = 31554400.

The previous prime is 31554361. The next prime is 31554409. The reversal of 31554401 is 10445513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27290176 + 4264225 = 5224^2 + 2065^2 .

It is a cyclic number.

It is not a de Polignac number, because 31554401 - 2⁶ = 31554337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31554409) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15777200 + 15777201.

It is an arithmetic number, because the mean of its divisors is an integer number (15777201).

Almost surely, 2^31554401 is an apocalyptic number.

It is an amenable number.

31554401 is a deficient number, since it is larger than the sum of its proper divisors (1).

31554401 is an equidigital number, since it uses as much as digits as its factorization.

31554401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 31554401 is about 5617.3304157758. The cubic root of 31554401 is about 315.9996828764. Note that the first 3 decimals are identical.

Adding to 31554401 its reverse (10445513), we get a palindrome (41999914).

The spelling of 31554401 in words is "thirty-one million, five hundred fifty-four thousand, four hundred one".