65157220 has 12 divisors (see below), whose sum is σ = 136830204. Its totient is φ = 26062880.

The previous prime is 65157203. The next prime is 65157227. The reversal of 65157220 is 2275156.

It can be written as a sum of positive squares in 2 ways, for example, as 23503104 + 41654116 = 4848^2 + 6454^2 .

It is not an unprimeable number, because it can be changed into a prime (65157227) 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, 1628911 + ... + 1628950.

It is an arithmetic number, because the mean of its divisors is an integer number (11402517).

Almost surely, 2^65157220 is an apocalyptic number.

It is an amenable number.

65157220 is an abundant number, since it is smaller than the sum of its proper divisors (71672984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65157220 is a wasteful number, since it uses less digits than its factorization.

65157220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257870 (or 3257868 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 65157220 is about 8072.0022299303. The cubic root of 65157220 is about 402.3964884342.

The spelling of 65157220 in words is "sixty-five million, one hundred fifty-seven thousand, two hundred twenty".