64121031 has 16 divisors (see below), whose sum is σ = 102301920. Its totient is φ = 39458880.

The previous prime is 64121027. The next prime is 64121053. The reversal of 64121031 is 13012146.

It is a happy number.

64121031 is a `hidden beast` number, since 641 + 21 + 0 + 3 + 1 = 666.

It is not a de Polignac number, because 64121031 - 2² = 64121027 is a prime.

It is a super-2 number, since 2×64121031² = 8223013233005922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64120995 and 64121013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64121011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90990 + ... + 91691.

It is an arithmetic number, because the mean of its divisors is an integer number (6393870).

Almost surely, 2^64121031 is an apocalyptic number.

64121031 is a deficient number, since it is larger than the sum of its proper divisors (38180889).

64121031 is a wasteful number, since it uses less digits than its factorization.

64121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182703 (or 182697 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 64121031 is about 8007.5608645829. The cubic root of 64121031 is about 400.2519891370.

Adding to 64121031 its reverse (13012146), we get a palindrome (77133177).

The spelling of 64121031 in words is "sixty-four million, one hundred twenty-one thousand, thirty-one".