157431407 has 8 divisors (see below), whose sum is σ = 190505376. Its totient is φ = 127003392.

The previous prime is 157431403. The next prime is 157431409. The reversal of 157431407 is 704134751.

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

It is a cyclic number.

It is not a de Polignac number, because 157431407 - 2² = 157431403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157431403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661358 + ... + 661595.

It is an arithmetic number, because the mean of its divisors is an integer number (23813172).

Almost surely, 2^157431407 is an apocalyptic number.

157431407 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

157431407 is a deficient number, since it is larger than the sum of its proper divisors (33073969).

157431407 is a wasteful number, since it uses less digits than its factorization.

157431407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322977.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 157431407 is about 12547.1672898707. The cubic root of 157431407 is about 539.9627397702.

The spelling of 157431407 in words is "one hundred fifty-seven million, four hundred thirty-one thousand, four hundred seven".