261031371 has 16 divisors (see below), whose sum is σ = 356737920. Its totient is φ = 169686720.

The previous prime is 261031361. The next prime is 261031387. The reversal of 261031371 is 173130162.

It is a de Polignac number, because none of the positive numbers 2^k-261031371 is a prime.

It is a super-2 number, since 2×261031371² = 136274753292279282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261031361) 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, 96840 + ... + 99498.

It is an arithmetic number, because the mean of its divisors is an integer number (22296120).

Almost surely, 2^261031371 is an apocalyptic number.

261031371 is a deficient number, since it is larger than the sum of its proper divisors (95706549).

261031371 is a wasteful number, since it uses less digits than its factorization.

261031371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 261031371 is about 16156.4653003063. The cubic root of 261031371 is about 639.0932561454.

The spelling of 261031371 in words is "two hundred sixty-one million, thirty-one thousand, three hundred seventy-one".