21461134031 has 4 divisors (see below), whose sum is σ = 21917753952. Its totient is φ = 21004514112.

The previous prime is 21461134007. The next prime is 21461134043. The reversal of 21461134031 is 13043116412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21461134031 - 2²² = 21456939727 is a prime.

It is a super-2 number, since 2×21461134031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21461134061) 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, 228309890 + ... + 228309983.

It is an arithmetic number, because the mean of its divisors is an integer number (5479438488).

Almost surely, 2^21461134031 is an apocalyptic number.

21461134031 is a deficient number, since it is larger than the sum of its proper divisors (456619921).

21461134031 is an equidigital number, since it uses as much as digits as its factorization.

21461134031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456619920.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 21461134031 in words is "twenty-one billion, four hundred sixty-one million, one hundred thirty-four thousand, thirty-one".