51623091 has 48 divisors (see below), whose sum is σ = 85076992. Its totient is φ = 29937600.

The previous prime is 51623081. The next prime is 51623093. The reversal of 51623091 is 19032615.

It is not a de Polignac number, because 51623091 - 2¹⁴ = 51606707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51623093) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 155796 + ... + 156126.

Almost surely, 2^51623091 is an apocalyptic number.

51623091 is a deficient number, since it is larger than the sum of its proper divisors (33453901).

51623091 is a wasteful number, since it uses less digits than its factorization.

51623091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 51623091 is about 7184.9210851616. The cubic root of 51623091 is about 372.3471222276.

The spelling of 51623091 in words is "fifty-one million, six hundred twenty-three thousand, ninety-one".