2421565157 has 4 divisors (see below), whose sum is σ = 2641707456. Its totient is φ = 2201422860.

The previous prime is 2421565151. The next prime is 2421565207. The reversal of 2421565157 is 7515651242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2421565157 - 2²⁴ = 2404787941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2421565157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421565151) 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, 110071133 + ... + 110071154.

It is an arithmetic number, because the mean of its divisors is an integer number (660426864).

Almost surely, 2^2421565157 is an apocalyptic number.

It is an amenable number.

2421565157 is a deficient number, since it is larger than the sum of its proper divisors (220142299).

2421565157 is a wasteful number, since it uses less digits than its factorization.

2421565157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220142298.

The product of its digits is 84000, while the sum is 38.

The square root of 2421565157 is about 49209.4011038541. The cubic root of 2421565157 is about 1342.8640673353.

The spelling of 2421565157 in words is "two billion, four hundred twenty-one million, five hundred sixty-five thousand, one hundred fifty-seven".