51497885 has 8 divisors (see below), whose sum is σ = 65050080. Its totient is φ = 39029904.

The previous prime is 51497869. The next prime is 51497891. The reversal of 51497885 is 58879415.

51497885 = T₄₅₃ + T₄₅₄ + ... + T₇₃₇.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51497885 - 2⁴ = 51497869 is a prime.

It is a congruent number.

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, 270947 + ... + 271136.

It is an arithmetic number, because the mean of its divisors is an integer number (8131260).

Almost surely, 2^51497885 is an apocalyptic number.

It is an amenable number.

51497885 is a deficient number, since it is larger than the sum of its proper divisors (13552195).

51497885 is a wasteful number, since it uses less digits than its factorization.

51497885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542107.

The product of its digits is 403200, while the sum is 47.

The square root of 51497885 is about 7176.2026866582. The cubic root of 51497885 is about 372.0458498426.

The spelling of 51497885 in words is "fifty-one million, four hundred ninety-seven thousand, eight hundred eighty-five".