51420356 has 24 divisors (see below), whose sum is σ = 98360640. Its totient is φ = 23376672.

The previous prime is 51420337. The next prime is 51420361. The reversal of 51420356 is 65302415.

It is a super-2 number, since 2×51420356² = 5288106022333472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3896 + ... + 10863.

It is an arithmetic number, because the mean of its divisors is an integer number (4098360).

Almost surely, 2^51420356 is an apocalyptic number.

It is an amenable number.

51420356 is a deficient number, since it is larger than the sum of its proper divisors (46940284).

51420356 is a wasteful number, since it uses less digits than its factorization.

51420356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14843 (or 14841 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 51420356 is about 7170.7988397388. The cubic root of 51420356 is about 371.8590536297.

The spelling of 51420356 in words is "fifty-one million, four hundred twenty thousand, three hundred fifty-six".