51277490 has 32 divisors (see below), whose sum is σ = 102409920. Its totient is φ = 18328000.

The previous prime is 51277489. The next prime is 51277493. The reversal of 51277490 is 9477215.

It is a self number, because there is not a number n which added to its sum of digits gives 51277490.

It is not an unprimeable number, because it can be changed into a prime (51277493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2540 + ... + 10440.

It is an arithmetic number, because the mean of its divisors is an integer number (3200310).

Almost surely, 2^51277490 is an apocalyptic number.

51277490 is a deficient number, since it is larger than the sum of its proper divisors (51132430).

51277490 is a wasteful number, since it uses less digits than its factorization.

51277490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7978.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 51277490 is about 7160.8302591250. The cubic root of 51277490 is about 371.5143438854.

The spelling of 51277490 in words is "fifty-one million, two hundred seventy-seven thousand, four hundred ninety".