56121031 has 8 divisors (see below), whose sum is σ = 57025584. Its totient is φ = 55222080.

The previous prime is 56121017. The next prime is 56121053. The reversal of 56121031 is 13012165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56121031 - 2¹¹ = 56118983 is a prime.

It is a super-2 number, since 2×56121031² = 6299140241005922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56121001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21771 + ... + 24211.

It is an arithmetic number, because the mean of its divisors is an integer number (7128198).

Almost surely, 2^56121031 is an apocalyptic number.

56121031 is a deficient number, since it is larger than the sum of its proper divisors (904553).

56121031 is a wasteful number, since it uses less digits than its factorization.

56121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 56121031 is about 7491.3971327116. The cubic root of 56121031 is about 382.8616620055.

Adding to 56121031 its reverse (13012165), we get a palindrome (69133196).

The spelling of 56121031 in words is "fifty-six million, one hundred twenty-one thousand, thirty-one".