51542270 has 16 divisors (see below), whose sum is σ = 99912960. Its totient is φ = 19030944.

The previous prime is 51542263. The next prime is 51542297. The reversal of 51542270 is 7224515.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 198110 + ... + 198369.

It is an arithmetic number, because the mean of its divisors is an integer number (6244560).

Almost surely, 2^51542270 is an apocalyptic number.

51542270 is a deficient number, since it is larger than the sum of its proper divisors (48370690).

51542270 is a wasteful number, since it uses less digits than its factorization.

51542270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396499.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 51542270 is about 7179.2945335875. The cubic root of 51542270 is about 372.1527054488.

Adding to 51542270 its reverse (7224515), we get a palindrome (58766785).

The spelling of 51542270 in words is "fifty-one million, five hundred forty-two thousand, two hundred seventy".