51023040 has 56 divisors (see below), whose sum is σ = 162001200. Its totient is φ = 13605888.

The previous prime is 51022997. The next prime is 51023053. The reversal of 51023040 is 4032015.

It is a super-2 number, since 2×51023040² = 5206701221683200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 25615 + ... + 27534.

Almost surely, 2^51023040 is an apocalyptic number.

It is an amenable number.

51023040 is an abundant number, since it is smaller than the sum of its proper divisors (110978160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51023040 is a wasteful number, since it uses less digits than its factorization.

51023040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53169 (or 53159 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51023040 is about 7143.0413690528. The cubic root of 51023040 is about 370.8988131087.

Adding to 51023040 its reverse (4032015), we get a palindrome (55055055).

Subtracting from 51023040 its reverse (4032015), we obtain a square (46991025 = 6855²).

The spelling of 51023040 in words is "fifty-one million, twenty-three thousand, forty".