51237401 has 4 divisors (see below), whose sum is σ = 51744804. Its totient is φ = 50730000.

The previous prime is 51237367. The next prime is 51237409. The reversal of 51237401 is 10473215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30261001 + 20976400 = 5501^2 + 4580^2 .

It is a cyclic number.

It is not a de Polignac number, because 51237401 - 2¹⁸ = 50975257 is a prime.

It is a super-2 number, since 2×51237401² = 5250542522469602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51237409) 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, 253550 + ... + 253751.

It is an arithmetic number, because the mean of its divisors is an integer number (12936201).

Almost surely, 2^51237401 is an apocalyptic number.

It is an amenable number.

51237401 is a deficient number, since it is larger than the sum of its proper divisors (507403).

51237401 is a wasteful number, since it uses less digits than its factorization.

51237401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507402.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51237401 is about 7158.0305252213. The cubic root of 51237401 is about 371.4175013818.

The spelling of 51237401 in words is "fifty-one million, two hundred thirty-seven thousand, four hundred one".