51490730 has 16 divisors (see below), whose sum is σ = 93585024. Its totient is φ = 20395920.

The previous prime is 51490727. The next prime is 51490781. The reversal of 51490730 is 3709415.

It is a junction number, because it is equal to n+sod(n) for n = 51490693 and 51490702.

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, 23966 + ... + 26025.

It is an arithmetic number, because the mean of its divisors is an integer number (5849064).

Almost surely, 2^51490730 is an apocalyptic number.

51490730 is a deficient number, since it is larger than the sum of its proper divisors (42094294).

51490730 is a wasteful number, since it uses less digits than its factorization.

51490730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50101.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 51490730 is about 7175.7041466326. The cubic root of 51490730 is about 372.0286186407.

The spelling of 51490730 in words is "fifty-one million, four hundred ninety thousand, seven hundred thirty".