157211680 has 24 divisors (see below), whose sum is σ = 371412972. Its totient is φ = 62884608.

The previous prime is 157211657. The next prime is 157211729. The reversal of 157211680 is 86112751.

It can be written as a sum of positive squares in 2 ways, for example, as 153066384 + 4145296 = 12372^2 + 2036^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491127 + ... + 491446.

Almost surely, 2^157211680 is an apocalyptic number.

157211680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157211680 is an abundant number, since it is smaller than the sum of its proper divisors (214201292).

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

157211680 is an equidigital number, since it uses as much as digits as its factorization.

157211680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982588 (or 982580 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 157211680 is about 12538.4081924302. The cubic root of 157211680 is about 539.7114141604.

The spelling of 157211680 in words is "one hundred fifty-seven million, two hundred eleven thousand, six hundred eighty".