31430157 has 8 divisors (see below), whose sum is σ = 45716640. Its totient is φ = 19048560.

The previous prime is 31430143. The next prime is 31430177. The reversal of 31430157 is 75103413.

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

It is a de Polignac number, because none of the positive numbers 2^k-31430157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31430117) 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, 476182 + ... + 476247.

It is an arithmetic number, because the mean of its divisors is an integer number (5714580).

Almost surely, 2^31430157 is an apocalyptic number.

It is an amenable number.

31430157 is a deficient number, since it is larger than the sum of its proper divisors (14286483).

31430157 is a wasteful number, since it uses less digits than its factorization.

31430157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952443.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 31430157 is about 5606.2605183848. The cubic root of 31430157 is about 315.5843926061.

The spelling of 31430157 in words is "thirty-one million, four hundred thirty thousand, one hundred fifty-seven".