157730031 has 16 divisors (see below), whose sum is σ = 233867520. Its totient is φ = 105066360.

The previous prime is 157730017. The next prime is 157730071. The reversal of 157730031 is 130037751.

It is not a de Polignac number, because 157730031 - 2⁷ = 157729903 is a prime.

It is a super-2 number, since 2×157730031² = 49757525358521922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 157729977 and 157730004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157730011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63886 + ... + 66308.

It is an arithmetic number, because the mean of its divisors is an integer number (14616720).

Almost surely, 2^157730031 is an apocalyptic number.

157730031 is a deficient number, since it is larger than the sum of its proper divisors (76137489).

157730031 is a wasteful number, since it uses less digits than its factorization.

157730031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843 (or 4837 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 27.

The square root of 157730031 is about 12559.0617085832. The cubic root of 157730031 is about 540.3039338399.

Adding to 157730031 its reverse (130037751), we get a palindrome (287767782).

The spelling of 157730031 in words is "one hundred fifty-seven million, seven hundred thirty thousand, thirty-one".