253156402 has 4 divisors (see below), whose sum is σ = 379734606. Its totient is φ = 126578200.

The previous prime is 253156357. The next prime is 253156403. The reversal of 253156402 is 204651352.

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

It can be written as a sum of positive squares in only one way, i.e., 251571321 + 1585081 = 15861^2 + 1259^2 .

It is not an unprimeable number, because it can be changed into a prime (253156403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63289099 + ... + 63289102.

Almost surely, 2^253156402 is an apocalyptic number.

253156402 is a deficient number, since it is larger than the sum of its proper divisors (126578204).

253156402 is a wasteful number, since it uses less digits than its factorization.

253156402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126578203.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 253156402 is about 15910.8894157429. The cubic root of 253156402 is about 632.6006563861.

The spelling of 253156402 in words is "two hundred fifty-three million, one hundred fifty-six thousand, four hundred two".