157507144 has 8 divisors (see below), whose sum is σ = 295325910. Its totient is φ = 78753568.

The previous prime is 157507139. The next prime is 157507153. The reversal of 157507144 is 441705751.

It can be written as a sum of positive squares in only one way, i.e., 147331044 + 10176100 = 12138^2 + 3190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×157507144² = 49617000822073472, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 9844189 + ... + 9844204.

Almost surely, 2^157507144 is an apocalyptic number.

It is an amenable number.

157507144 is a deficient number, since it is larger than the sum of its proper divisors (137818766).

157507144 is a wasteful number, since it uses less digits than its factorization.

157507144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19688399 (or 19688395 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 157507144 is about 12550.1850185565. The cubic root of 157507144 is about 540.0493141978.

The spelling of 157507144 in words is "one hundred fifty-seven million, five hundred seven thousand, one hundred forty-four".