51557230 has 16 divisors (see below), whose sum is σ = 93396960. Its totient is φ = 20490912.

The previous prime is 51557221. The next prime is 51557239. The reversal of 51557230 is 3275515.

It is an interprime number because it is at equal distance from previous prime (51557221) and next prime (51557239).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51557239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14850 + ... + 17989.

It is an arithmetic number, because the mean of its divisors is an integer number (5837310).

Almost surely, 2^51557230 is an apocalyptic number.

51557230 is a deficient number, since it is larger than the sum of its proper divisors (41839730).

51557230 is a wasteful number, since it uses less digits than its factorization.

51557230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33003.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 51557230 is about 7180.3363430970. The cubic root of 51557230 is about 372.1887073939.

The spelling of 51557230 in words is "fifty-one million, five hundred fifty-seven thousand, two hundred thirty".