2251231542 has 40 divisors (see below), whose sum is σ = 5765061456. Its totient is φ = 643208688.

The previous prime is 2251231537. The next prime is 2251231547. The reversal of 2251231542 is 2451321522.

It is an interprime number because it is at equal distance from previous prime (2251231537) and next prime (2251231547).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251231547) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 991473 + ... + 993740.

Almost surely, 2^2251231542 is an apocalyptic number.

2251231542 is an abundant number, since it is smaller than the sum of its proper divisors (3513829914).

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

2251231542 is a wasteful number, since it uses less digits than its factorization.

2251231542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985234 (or 1985225 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 2251231542 is about 47447.1447191504. The cubic root of 2251231542 is about 1310.6097315050.

The spelling of 2251231542 in words is "two billion, two hundred fifty-one million, two hundred thirty-one thousand, five hundred forty-two".