2551402542 has 64 divisors (see below), whose sum is σ = 5695764480. Its totient is φ = 756518784.

The previous prime is 2551402519. The next prime is 2551402547. The reversal of 2551402542 is 2452041552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551402547) 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, 1951453 + ... + 1952759.

It is an arithmetic number, because the mean of its divisors is an integer number (88996320).

Almost surely, 2^2551402542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2551402542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2847882240).

2551402542 is an abundant number, since it is smaller than the sum of its proper divisors (3144361938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2551402542 is a wasteful number, since it uses less digits than its factorization.

2551402542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 2551402542 is about 50511.4100179356. The cubic root of 2551402542 is about 1366.4476391279.

The spelling of 2551402542 in words is "two billion, five hundred fifty-one million, four hundred two thousand, five hundred forty-two".