2621286403 has 4 divisors (see below), whose sum is σ = 2625605440. Its totient is φ = 2616967368.

The previous prime is 2621286373. The next prime is 2621286419. The reversal of 2621286403 is 3046821262.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2621286403 is a prime.

It is a super-2 number, since 2×2621286403² = 13742284813105356818, which contains 22 as substring.

It is the 51199-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2621286443) by changing a digit.

It is a nontrivial repunit in base 51198.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2158608 + ... + 2159821.

It is an arithmetic number, because the mean of its divisors is an integer number (656401360).

Almost surely, 2^2621286403 is an apocalyptic number.

2621286403 is a deficient number, since it is larger than the sum of its proper divisors (4319037).

2621286403 is an equidigital number, since it uses as much as digits as its factorization.

2621286403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319036.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 2621286403 is about 51198.5000073244. The cubic root of 2621286403 is about 1378.8112711868.

The spelling of 2621286403 in words is "two billion, six hundred twenty-one million, two hundred eighty-six thousand, four hundred three".