51186490 has 32 divisors (see below), whose sum is σ = 98086464. Its totient is φ = 19165440.

The previous prime is 51186467. The next prime is 51186511. The reversal of 51186490 is 9468115.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35157 + ... + 36583.

It is an arithmetic number, because the mean of its divisors is an integer number (3065202).

Almost surely, 2^51186490 is an apocalyptic number.

51186490 is a deficient number, since it is larger than the sum of its proper divisors (46899974).

51186490 is a wasteful number, since it uses less digits than its factorization.

51186490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 51186490 is about 7154.4734257666. The cubic root of 51186490 is about 371.2944434695.

The spelling of 51186490 in words is "fifty-one million, one hundred eighty-six thousand, four hundred ninety".