157102345 has 4 divisors (see below), whose sum is σ = 188522820. Its totient is φ = 125681872.

The previous prime is 157102343. The next prime is 157102381. The reversal of 157102345 is 543201751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543201751 = 5659 ⋅95989.

It can be written as a sum of positive squares in 2 ways, for example, as 66243321 + 90859024 = 8139^2 + 9532^2 .

It is a cyclic number.

It is not a de Polignac number, because 157102345 - 2¹ = 157102343 is a prime.

It is a super-2 number, since 2×157102345² = 49362293608998050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157102343) 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, 15710230 + ... + 15710239.

It is an arithmetic number, because the mean of its divisors is an integer number (47130705).

Almost surely, 2^157102345 is an apocalyptic number.

It is an amenable number.

157102345 is a deficient number, since it is larger than the sum of its proper divisors (31420475).

157102345 is an equidigital number, since it uses as much as digits as its factorization.

157102345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31420474.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 157102345 is about 12534.0474308980. The cubic root of 157102345 is about 539.5862685979.

The spelling of 157102345 in words is "one hundred fifty-seven million, one hundred two thousand, three hundred forty-five".