157211890 has 96 divisors (see below), whose sum is σ = 337742784. Its totient is φ = 52202880.

The previous prime is 157211863. The next prime is 157211893. The reversal of 157211890 is 98112751.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157211893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1469217 + ... + 1469323.

It is an arithmetic number, because the mean of its divisors is an integer number (3518154).

Almost surely, 2^157211890 is an apocalyptic number.

157211890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157211890 is an abundant number, since it is smaller than the sum of its proper divisors (180530894).

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

157211890 is a wasteful number, since it uses less digits than its factorization.

157211890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 157211890 is about 12538.4165666961. The cubic root of 157211890 is about 539.7116544720.

The spelling of 157211890 in words is "one hundred fifty-seven million, two hundred eleven thousand, eight hundred ninety".