157321442 has 16 divisors (see below), whose sum is σ = 238360320. Its totient is φ = 77872368.

The previous prime is 157321429. The next prime is 157321459. The reversal of 157321442 is 244123751.

It is a super-2 number, since 2×157321442² = 49500072225918728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88559 + ... + 90317.

It is an arithmetic number, because the mean of its divisors is an integer number (14897520).

Almost surely, 2^157321442 is an apocalyptic number.

157321442 is a deficient number, since it is larger than the sum of its proper divisors (81038878).

157321442 is a wasteful number, since it uses less digits than its factorization.

157321442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185.

The product of its digits is 6720, while the sum is 29.

The square root of 157321442 is about 12542.7844596007. The cubic root of 157321442 is about 539.8369901204.

The spelling of 157321442 in words is "one hundred fifty-seven million, three hundred twenty-one thousand, four hundred forty-two".