15400202142 has 32 divisors (see below), whose sum is σ = 33265314432. Its totient is φ = 4724859744.

The previous prime is 15400202113. The next prime is 15400202143. The reversal of 15400202142 is 24120200451.

It is a super-2 number, since 2×15400202142² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15400202143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257428 + ... + 311559.

It is an arithmetic number, because the mean of its divisors is an integer number (1039541076).

Almost surely, 2^15400202142 is an apocalyptic number.

15400202142 is an abundant number, since it is smaller than the sum of its proper divisors (17865112290).

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

15400202142 is a wasteful number, since it uses less digits than its factorization.

15400202142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569352.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 15400202142 its reverse (24120200451), we get a palindrome (39520402593).

The spelling of 15400202142 in words is "fifteen billion, four hundred million, two hundred two thousand, one hundred forty-two".