157431490 has 8 divisors (see below), whose sum is σ = 283376700. Its totient is φ = 62972592.

The previous prime is 157431479. The next prime is 157431497. The reversal of 157431490 is 94134751.

157431490 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 148425489 + 9006001 = 12183^2 + 3001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (157431497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7871565 + ... + 7871584.

Almost surely, 2^157431490 is an apocalyptic number.

157431490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157431490 is a deficient number, since it is larger than the sum of its proper divisors (125945210).

157431490 is a wasteful number, since it uses less digits than its factorization.

157431490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15743156.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 157431490 is about 12547.1705973897. The cubic root of 157431490 is about 539.9628346621.

The spelling of 157431490 in words is "one hundred fifty-seven million, four hundred thirty-one thousand, four hundred ninety".