57200121428 has 24 divisors (see below), whose sum is σ = 100901687040. Its totient is φ = 28371980000.

The previous prime is 57200121421. The next prime is 57200121437. The reversal of 57200121428 is 82412100275.

It is a junction number, because it is equal to n+sod(n) for n = 57200121394 and 57200121403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57200121421) 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, 137678 + ... + 365178.

It is an arithmetic number, because the mean of its divisors is an integer number (4204236960).

Almost surely, 2^57200121428 is an apocalyptic number.

It is an amenable number.

57200121428 is a deficient number, since it is larger than the sum of its proper divisors (43701565612).

57200121428 is a wasteful number, since it uses less digits than its factorization.

57200121428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228007 (or 228005 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 57200121428 in words is "fifty-seven billion, two hundred million, one hundred twenty-one thousand, four hundred twenty-eight".