51402190 has 32 divisors (see below), whose sum is σ = 106352064. Its totient is φ = 17521920.

The previous prime is 51402187. The next prime is 51402193. The reversal of 51402190 is 9120415.

It is an interprime number because it is at equal distance from previous prime (51402187) and next prime (51402193).

It is a super-2 number, since 2×51402190² = 5284370273592200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51402193) 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, 10642 + ... + 14698.

It is an arithmetic number, because the mean of its divisors is an integer number (3323502).

Almost surely, 2^51402190 is an apocalyptic number.

51402190 is an abundant number, since it is smaller than the sum of its proper divisors (54949874).

51402190 is a wasteful number, since it uses less digits than its factorization.

51402190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 51402190 is about 7169.5320628337. The cubic root of 51402190 is about 371.8152578275.

The spelling of 51402190 in words is "fifty-one million, four hundred two thousand, one hundred ninety".