2251555542 has 20 divisors (see below), whose sum is σ = 5045152596. Its totient is φ = 750518460.

The previous prime is 2251555511. The next prime is 2251555543. The reversal of 2251555542 is 2455551522.

2251555542 is a `hidden beast` number, since 2 + 2 + 51 + 55 + 554 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2251555497 and 2251555506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251555543) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6949084 + ... + 6949407.

Almost surely, 2^2251555542 is an apocalyptic number.

2251555542 is an abundant number, since it is smaller than the sum of its proper divisors (2793597054).

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

2251555542 is a wasteful number, since it uses less digits than its factorization.

2251555542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13898505 (or 13898496 counting only the distinct ones).

The product of its digits is 100000, while the sum is 36.

The square root of 2251555542 is about 47450.5589218926. The cubic root of 2251555542 is about 1310.6726033414.

The spelling of 2251555542 in words is "two billion, two hundred fifty-one million, five hundred fifty-five thousand, five hundred forty-two".