1361402331 has 32 divisors (see below), whose sum is σ = 1890623040. Its totient is φ = 870912000.

The previous prime is 1361402327. The next prime is 1361402333. The reversal of 1361402331 is 1332041631.

It is a happy number.

It is not a de Polignac number, because 1361402331 - 2² = 1361402327 is a prime.

It is a super-2 number, since 2×1361402331² = 3706832613704467122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1361402333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1348755 + ... + 1349763.

It is an arithmetic number, because the mean of its divisors is an integer number (59081970).

Almost surely, 2^1361402331 is an apocalyptic number.

1361402331 is a deficient number, since it is larger than the sum of its proper divisors (529220709).

1361402331 is a wasteful number, since it uses less digits than its factorization.

1361402331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1361402331 is about 36897.1859496087. The cubic root of 1361402331 is about 1108.3123261525.

Adding to 1361402331 its reverse (1332041631), we get a palindrome (2693443962).

The spelling of 1361402331 in words is "one billion, three hundred sixty-one million, four hundred two thousand, three hundred thirty-one".