56138225 has 48 divisors (see below), whose sum is σ = 83994624. Its totient is φ = 36672000.

The previous prime is 56138221. The next prime is 56138237. The reversal of 56138225 is 52283165.

It is not a de Polignac number, because 56138225 - 2² = 56138221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56138191 and 56138200.

It is not an unprimeable number, because it can be changed into a prime (56138221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 146384 + ... + 146766.

It is an arithmetic number, because the mean of its divisors is an integer number (1749888).

Almost surely, 2^56138225 is an apocalyptic number.

56138225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56138225 is a deficient number, since it is larger than the sum of its proper divisors (27856399).

56138225 is a wasteful number, since it uses less digits than its factorization.

56138225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 453 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 56138225 is about 7492.5446278284. The cubic root of 56138225 is about 382.9007575765.

The spelling of 56138225 in words is "fifty-six million, one hundred thirty-eight thousand, two hundred twenty-five".