51157870 has 8 divisors (see below), whose sum is σ = 92084184. Its totient is φ = 20463144.

The previous prime is 51157853. The next prime is 51157871. The reversal of 51157870 is 7875115.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51157871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2557884 + ... + 2557903.

It is an arithmetic number, because the mean of its divisors is an integer number (11510523).

Almost surely, 2^51157870 is an apocalyptic number.

51157870 is a deficient number, since it is larger than the sum of its proper divisors (40926314).

51157870 is a wasteful number, since it uses less digits than its factorization.

51157870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115794.

The product of its (nonzero) digits is 9800, while the sum is 34.

The square root of 51157870 is about 7152.4729989005. The cubic root of 51157870 is about 371.2252297107.

The spelling of 51157870 in words is "fifty-one million, one hundred fifty-seven thousand, eight hundred seventy".