51490494 has 48 divisors (see below), whose sum is σ = 128119680. Its totient is φ = 14780880.

The previous prime is 51490493. The next prime is 51490519. The reversal of 51490494 is 49409415.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51490493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3082 + ... + 10605.

It is an arithmetic number, because the mean of its divisors is an integer number (2669160).

Almost surely, 2^51490494 is an apocalyptic number.

51490494 is an abundant number, since it is smaller than the sum of its proper divisors (76629186).

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

51490494 is a wasteful number, since it uses less digits than its factorization.

51490494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13725 (or 13722 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 51490494 is about 7175.6877022345. The cubic root of 51490494 is about 372.0280502608.

It can be divided in two parts, 51490 and 494, that added together give a square (51984 = 228²).

The spelling of 51490494 in words is "fifty-one million, four hundred ninety thousand, four hundred ninety-four".