261263350 has 48 divisors (see below), whose sum is σ = 508717440. Its totient is φ = 99705600.

The previous prime is 261263339. The next prime is 261263363. The reversal of 261263350 is 53362162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111996 + ... + 114304.

It is an arithmetic number, because the mean of its divisors is an integer number (10598280).

Almost surely, 2^261263350 is an apocalyptic number.

261263350 is a deficient number, since it is larger than the sum of its proper divisors (247454090).

261263350 is a wasteful number, since it uses less digits than its factorization.

261263350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425 (or 2420 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 261263350 is about 16163.6428443591. The cubic root of 261263350 is about 639.2825211586.

It can be divided in two parts, 26 and 1263350, that added together give a square (1263376 = 1124²).

The spelling of 261263350 in words is "two hundred sixty-one million, two hundred sixty-three thousand, three hundred fifty".