157997200 has 30 divisors (see below), whose sum is σ = 379589234. Its totient is φ = 63198720.

The previous prime is 157997171. The next prime is 157997207. The reversal of 157997200 is 2799751.

It can be written as a sum of positive squares in 3 ways, for example, as 25563136 + 132434064 = 5056^2 + 11508^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (157997207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197097 + ... + 197896.

Almost surely, 2^157997200 is an apocalyptic number.

157997200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157997200 is an abundant number, since it is smaller than the sum of its proper divisors (221592034).

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

157997200 is a wasteful number, since it uses less digits than its factorization.

157997200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395011 (or 395000 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 157997200 is about 12569.6937114633. The cubic root of 157997200 is about 540.6088240674.

The spelling of 157997200 in words is "one hundred fifty-seven million, nine hundred ninety-seven thousand, two hundred".